videos in AudioSet
A list of about a million ten-second YouTube clips, each labelled with the sounds in it, that Google published in 2017. Labs use it to train and test general audio and music models.
Including Beethoven Sonata in F major for Cello and Piano, Op. 5 Nr. 1 (part 1), Nausicaä of the Valley of the Wind (arrangement for cello and piano)